1/*
2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#define KRB5_DEPRECATED /* uses v4 functions that will die */
35
36#include "hprop.h"
37
38static int version_flag;
39static int help_flag;
40static const char *ktname = HPROP_KEYTAB;
41static const char *database;
42static char *mkeyfile;
43static int to_stdout;
44static int verbose_flag;
45static int encrypt_flag;
46static int decrypt_flag;
47static hdb_master_key mkey5;
48
49static char *source_type;
50
51static char *local_realm=NULL;
52
53static int
54open_socket(krb5_context context, const char *hostname, const char *port)
55{
56    struct addrinfo *ai, *a;
57    struct addrinfo hints;
58    int error;
59
60    memset (&hints, 0, sizeof(hints));
61    hints.ai_socktype = SOCK_STREAM;
62    hints.ai_protocol = IPPROTO_TCP;
63
64    error = getaddrinfo (hostname, port, &hints, &ai);
65    if (error) {
66	warnx ("%s: %s", hostname, gai_strerror(error));
67	return -1;
68    }
69
70    for (a = ai; a != NULL; a = a->ai_next) {
71	int s;
72
73	s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
74	if (s < 0)
75	    continue;
76	socket_set_nopipe(s, 1);
77	if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
78	    warn ("connect(%s)", hostname);
79	    close (s);
80	    continue;
81	}
82	freeaddrinfo (ai);
83	return s;
84    }
85    warnx ("failed to contact %s", hostname);
86    freeaddrinfo (ai);
87    return -1;
88}
89
90krb5_error_code
91v5_prop(krb5_context context, HDB *db, hdb_entry_ex *entry, void *appdata)
92{
93    krb5_error_code ret;
94    struct prop_data *pd = appdata;
95    krb5_data data;
96
97    if(encrypt_flag) {
98	ret = hdb_seal_keys_mkey(context, &entry->entry, mkey5);
99	if (ret) {
100	    krb5_warn(context, ret, "hdb_seal_keys_mkey");
101	    return ret;
102	}
103    }
104    if(decrypt_flag) {
105	ret = hdb_unseal_keys_mkey(context, &entry->entry, mkey5);
106	if (ret) {
107	    krb5_warn(context, ret, "hdb_unseal_keys_mkey");
108	    return ret;
109	}
110    }
111
112    ret = hdb_entry2value(context, &entry->entry, &data);
113    if(ret) {
114	krb5_warn(context, ret, "hdb_entry2value");
115	return ret;
116    }
117
118    if(to_stdout)
119	ret = krb5_write_message(context, &pd->sock, &data);
120    else
121	ret = krb5_write_priv_message(context, pd->auth_context,
122				      &pd->sock, &data);
123    krb5_data_free(&data);
124    return ret;
125}
126
127struct getargs args[] = {
128    { "master-key", 'm', arg_string, &mkeyfile, "v5 master key file", "file" },
129    { "database", 'd',	arg_string, rk_UNCONST(&database), "database", "file" },
130    { "source",   0,	arg_string, &source_type, "type of database to read",
131      "heimdal"
132      "|mit-dump"
133    },
134
135    { "keytab",   'k',	arg_string, rk_UNCONST(&ktname),
136      "keytab to use for authentication", "keytab" },
137    { "v5-realm", 'R',  arg_string, &local_realm, "v5 realm to use", NULL },
138    { "decrypt",  'D',  arg_flag,   &decrypt_flag,   "decrypt keys", NULL },
139    { "encrypt",  'E',  arg_flag,   &encrypt_flag,   "encrypt keys", NULL },
140    { "stdout",	  'n',  arg_flag,   &to_stdout, "dump to stdout", NULL },
141    { "verbose",  'v',	arg_flag, &verbose_flag, NULL, NULL },
142    { "version",   0,	arg_flag, &version_flag, NULL, NULL },
143    { "help",     'h',	arg_flag, &help_flag, NULL, NULL }
144};
145
146static int num_args = sizeof(args) / sizeof(args[0]);
147
148static void
149usage(int ret)
150{
151    arg_printusage (args, num_args, NULL, "[host[:port]] ...");
152    exit (ret);
153}
154
155static void
156get_creds(krb5_context context, krb5_ccache *cache)
157{
158    krb5_keytab keytab;
159    krb5_principal client;
160    krb5_error_code ret;
161    krb5_get_init_creds_opt *init_opts;
162    krb5_preauthtype preauth = KRB5_PADATA_ENC_TIMESTAMP;
163    krb5_creds creds;
164
165    ret = krb5_kt_register(context, &hdb_kt_ops);
166    if(ret) krb5_err(context, 1, ret, "krb5_kt_register");
167
168    ret = krb5_kt_resolve(context, ktname, &keytab);
169    if(ret) krb5_err(context, 1, ret, "krb5_kt_resolve");
170
171    ret = krb5_make_principal(context, &client, NULL,
172			      "kadmin", HPROP_NAME, NULL);
173    if(ret) krb5_err(context, 1, ret, "krb5_make_principal");
174
175    ret = krb5_get_init_creds_opt_alloc(context, &init_opts);
176    if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
177    krb5_get_init_creds_opt_set_preauth_list(init_opts, &preauth, 1);
178
179    ret = krb5_get_init_creds_keytab(context, &creds, client, keytab, 0, NULL, init_opts);
180    if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds");
181
182    krb5_get_init_creds_opt_free(context, init_opts);
183
184    ret = krb5_kt_close(context, keytab);
185    if(ret) krb5_err(context, 1, ret, "krb5_kt_close");
186
187    ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, cache);
188    if(ret) krb5_err(context, 1, ret, "krb5_cc_new_unique");
189
190    ret = krb5_cc_initialize(context, *cache, client);
191    if(ret) krb5_err(context, 1, ret, "krb5_cc_initialize");
192
193    krb5_free_principal(context, client);
194
195    ret = krb5_cc_store_cred(context, *cache, &creds);
196    if(ret) krb5_err(context, 1, ret, "krb5_cc_store_cred");
197
198    krb5_free_cred_contents(context, &creds);
199}
200
201enum hprop_source {
202    HPROP_HEIMDAL = 1,
203    HPROP_MIT_DUMP
204};
205
206struct {
207    int type;
208    const char *name;
209} types[] = {
210    { HPROP_HEIMDAL,	"heimdal" },
211    { HPROP_MIT_DUMP,	"mit-dump" }
212};
213
214static int
215parse_source_type(const char *s)
216{
217    size_t i;
218    for(i = 0; i < sizeof(types) / sizeof(types[0]); i++) {
219	if(strstr(types[i].name, s) == types[i].name)
220	    return types[i].type;
221    }
222    return 0;
223}
224
225static int
226iterate (krb5_context context,
227	 const char *database_name,
228	 HDB *db,
229	 int type,
230	 struct prop_data *pd)
231{
232    int ret;
233
234    switch(type) {
235    case HPROP_MIT_DUMP:
236	ret = hdb_mit_dump(context, database_name, v5_prop, pd);
237	if (ret)
238	    krb5_warn(context, ret, "mit_prop_dump");
239	break;
240    case HPROP_HEIMDAL:
241	ret = hdb_foreach(context, db, HDB_F_DECRYPT, v5_prop, pd);
242	if(ret)
243	    krb5_warn(context, ret, "hdb_foreach");
244	break;
245    default:
246	krb5_errx(context, 1, "unknown prop type: %d", type);
247    }
248    return ret;
249}
250
251static int
252dump_database (krb5_context context, int type,
253	       const char *database_name, HDB *db)
254{
255    krb5_error_code ret;
256    struct prop_data pd;
257    krb5_data data;
258
259    pd.context      = context;
260    pd.auth_context = NULL;
261    pd.sock         = STDOUT_FILENO;
262
263    ret = iterate (context, database_name, db, type, &pd);
264    if (ret)
265	krb5_errx(context, 1, "iterate failure");
266    krb5_data_zero (&data);
267    ret = krb5_write_message (context, &pd.sock, &data);
268    if (ret)
269	krb5_err(context, 1, ret, "krb5_write_message");
270
271    return 0;
272}
273
274static int
275propagate_database (krb5_context context, int type,
276		    const char *database_name,
277		    HDB *db, krb5_ccache ccache,
278		    int optidx, int argc, char **argv)
279{
280    krb5_principal server;
281    krb5_error_code ret;
282    int i, failed = 0;
283
284    for(i = optidx; i < argc; i++){
285	krb5_auth_context auth_context;
286	int fd;
287	struct prop_data pd;
288	krb5_data data;
289
290	char *port, portstr[NI_MAXSERV];
291	char *host = argv[i];
292
293	port = strchr(host, ':');
294	if(port == NULL) {
295	    snprintf(portstr, sizeof(portstr), "%u",
296		     ntohs(krb5_getportbyname (context, "hprop", "tcp",
297					       HPROP_PORT)));
298	    port = portstr;
299	} else
300	    *port++ = '\0';
301
302	fd = open_socket(context, host, port);
303	if(fd < 0) {
304	    failed++;
305	    krb5_warn (context, errno, "connect %s", host);
306	    continue;
307	}
308
309	ret = krb5_sname_to_principal(context, argv[i],
310				      HPROP_NAME, KRB5_NT_SRV_HST, &server);
311	if(ret) {
312	    failed++;
313	    krb5_warn(context, ret, "krb5_sname_to_principal(%s)", host);
314	    close(fd);
315	    continue;
316	}
317
318        if (local_realm) {
319            krb5_realm my_realm;
320            krb5_get_default_realm(context,&my_realm);
321            krb5_principal_set_realm(context,server,my_realm);
322	    krb5_xfree(my_realm);
323        }
324
325	auth_context = NULL;
326	ret = krb5_sendauth(context,
327			    &auth_context,
328			    &fd,
329			    HPROP_VERSION,
330			    NULL,
331			    server,
332			    AP_OPTS_MUTUAL_REQUIRED | AP_OPTS_USE_SUBKEY,
333			    NULL, /* in_data */
334			    NULL, /* in_creds */
335			    ccache,
336			    NULL,
337			    NULL,
338			    NULL);
339
340	krb5_free_principal(context, server);
341
342	if(ret) {
343	    failed++;
344	    krb5_warn(context, ret, "krb5_sendauth (%s)", host);
345	    close(fd);
346	    goto next_host;
347	}
348
349	pd.context      = context;
350	pd.auth_context = auth_context;
351	pd.sock         = fd;
352
353	ret = iterate (context, database_name, db, type, &pd);
354	if (ret) {
355	    krb5_warnx(context, "iterate to host %s failed", host);
356	    failed++;
357	    goto next_host;
358	}
359
360	krb5_data_zero (&data);
361	ret = krb5_write_priv_message(context, auth_context, &fd, &data);
362	if(ret) {
363	    krb5_warn(context, ret, "krb5_write_priv_message");
364	    failed++;
365	    goto next_host;
366	}
367
368	ret = krb5_read_priv_message(context, auth_context, &fd, &data);
369	if(ret) {
370	    krb5_warn(context, ret, "krb5_read_priv_message: %s", host);
371	    failed++;
372	    goto next_host;
373	} else
374	    krb5_data_free (&data);
375
376    next_host:
377	krb5_auth_con_free(context, auth_context);
378	close(fd);
379    }
380    if (failed)
381	return 1;
382    return 0;
383}
384
385int
386main(int argc, char **argv)
387{
388    krb5_error_code ret;
389    krb5_context context;
390    krb5_ccache ccache = NULL;
391    HDB *db = NULL;
392    int optidx = 0;
393
394    int type, exit_code;
395
396    setprogname(argv[0]);
397
398    if(getarg(args, num_args, argc, argv, &optidx))
399	usage(1);
400
401    if(help_flag)
402	usage(0);
403
404    if(version_flag){
405	print_version(NULL);
406	exit(0);
407    }
408
409    ret = krb5_init_context(&context);
410    if(ret)
411	exit(1);
412
413    /* We may be reading an old database encrypted with a DES master key. */
414    ret = krb5_allow_weak_crypto(context, 1);
415    if(ret)
416        krb5_err(context, 1, ret, "krb5_allow_weak_crypto");
417
418    if(local_realm)
419	krb5_set_default_realm(context, local_realm);
420
421    if(encrypt_flag && decrypt_flag)
422	krb5_errx(context, 1,
423		  "only one of `--encrypt' and `--decrypt' is meaningful");
424
425    if(source_type != NULL) {
426	type = parse_source_type(source_type);
427	if(type == 0)
428	    krb5_errx(context, 1, "unknown source type `%s'", source_type);
429    } else
430	type = HPROP_HEIMDAL;
431
432    if(!to_stdout)
433	get_creds(context, &ccache);
434
435    if(decrypt_flag || encrypt_flag) {
436	ret = hdb_read_master_key(context, mkeyfile, &mkey5);
437	if(ret && ret != ENOENT)
438	    krb5_err(context, 1, ret, "hdb_read_master_key");
439	if(ret)
440	    krb5_errx(context, 1, "No master key file found");
441    }
442
443    switch(type) {
444    case HPROP_MIT_DUMP:
445	if (database == NULL)
446	    krb5_errx(context, 1, "no dump file specified");
447	break;
448    case HPROP_HEIMDAL:
449	ret = hdb_create (context, &db, database);
450	if(ret)
451	    krb5_err(context, 1, ret, "hdb_create: %s", database);
452	ret = db->hdb_open(context, db, O_RDONLY, 0);
453	if(ret)
454	    krb5_err(context, 1, ret, "db->hdb_open");
455	break;
456    default:
457	krb5_errx(context, 1, "unknown dump type `%d'", type);
458	break;
459    }
460
461    if (to_stdout)
462	exit_code = dump_database (context, type, database, db);
463    else
464	exit_code = propagate_database (context, type, database,
465					db, ccache, optidx, argc, argv);
466
467    if(ccache != NULL)
468	krb5_cc_destroy(context, ccache);
469
470    if(db != NULL)
471	(*db->hdb_destroy)(context, db);
472
473    krb5_free_context(context);
474    return exit_code;
475}
476